A novel photoelectrochemical sensor based on g-C3N4@CdS QDs for sensitive detection of Hg2+

被引：52

作者：

Li, Zhongping ^{[1
,2
]}

Dong, Wenxia ^{[1
,2
]}

Du, Xiaoyu ^{[1
,2
]}

Wen, Guangming ^{[1
,2
,3
]}

Fan, Xiujun ^{[4
]}

机构：

[1] Shanxi Univ, Inst Environm Sci, Taiyuan 030006, Shanxi, Peoples R China

[2] Shanxi Univ, Sch Chem & Chem Engn, Taiyuan 030006, Shanxi, Peoples R China

[3] Jinzhong Univ, Sch Chem & Chem Engn, Jinzhong 030619, Peoples R China

[4] Shanxi Univ, Inst Crystalline Mat, Taiyuan 030006, Shanxi, Peoples R China

来源：

MICROCHEMICAL JOURNAL | 2020年 / 152卷

基金：

中国国家自然科学基金;

关键词：

Photoelectrochemical; He2+; Graphite carbonitride (g-C3N4); CdS quantum dots (CdS QDs); HYDROGEN EVOLUTION; CARBON NITRIDE; QUANTUM DOTS; DOPED G-C3N4; HG2+; PHOTOCATALYST; COCATALYST; GENERATION; APTASENSOR; NANOSHEETS;

D O I：

10.1016/j.microc.2019.104259

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Graphite carbonitride (g-C3N4) is one of the ideal metal-free semiconductors for photocatalysis, quantum dots are excellent photoelectrically active materials, and both have broad application prospects in photoelectrochemical (PEC) devices. In this work, a novel photoelectrochemical (PEC) sensor was latest employed based on the complex of g-C(3)N(4 )and CdS QD (g-C3N4@CdS) fixated on a tin oxyfluoride (FTO) electrode for discovering Hg2+. The PEC system showed a good linear range of 20-550 nM, with a detection limit of 12 nM, The possible mechanism is signal shutdown strategy based on a lower sedimentation equilibrium constant of HgS. Thus, the g-C3N4@CdS based PEC sensor had positive effect on solving some issues, such as complicated operation, in the detection of He2+.

引用

页数：7

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